21033442223224 has 32 divisors (see below), whose sum is σ = 39762944010720. Its totient is φ = 10430134926336.

The previous prime is 21033442223219. The next prime is 21033442223237. The reversal of 21033442223224 is 42232224433012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21033442223224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7861809 + ... + 10191904.

It is an arithmetic number, because the mean of its divisors is an integer number (1242592000335).

Almost surely, 2^{21033442223224} is an apocalyptic number.

It is an amenable number.

21033442223224 is a deficient number, since it is larger than the sum of its proper divisors (18729501787496).

21033442223224 is a wasteful number, since it uses less digits than its factorization.

21033442223224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18054919 (or 18054915 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 21033442223224 its reverse (42232224433012), we get a palindrome (63265666656236).

The spelling of 21033442223224 in words is "twenty-one trillion, thirty-three billion, four hundred forty-two million, two hundred twenty-three thousand, two hundred twenty-four".